Wpa

Back before the iPhone, I was using one of GRC.com's long, pseudo-random passwords for my WPA-protected Wi-Fi network. Typing it into iPhone 1.x, even iPhone 2.x was a non-starter, however, so I shrank it down considerably.

Similar security-conscious folks have lamented not only the lack of copy and paste on the iPhone, but especially the lack of "paste-into-password field" to support just those kinds of super-secure strings.